Idealism is like a castle in the air if it is not based on a solid foundation of social and political realism.

Idealism is like a castle in the air if it is not based on a solid foundation of social and political realism.

理想主义如果没有社会和政治现实主义的坚实基础，就像空中楼阁。

-- Claude McKay 克劳德·麦凯